Let A = R – {3} and B = R – {1}. Consider the function f : A B defined by . Show that f is one-one and onto and hence find f - 1.
Given that A = R - { 3 }, B = R - { 1 }
Consider the function
Let x, y A such that f ( x ) = f ( y )
Let y b = R - { 1 }
Then, y 1. The function f is onto if there exists x A such that f ( x ) = y.
Now, F ( x ) = y
Hence, the function is one - one and onto.
Therefore, f - 1 exists.
Consider equation ( i ).
Using matrices solve the following system of linear equations:
x - y + 2 z = 7
3 x + 4 y - 5 z = - 5
2 x - y + 3 z = 12